Our standards

All Wood Window Alliance members’ windows must meet or exceed the following requirements. Once these standards have been met, members are able to display the distinctive Wood Window Alliance brandmark, which is a reassurance of independently audited quality and performance.

• BS 644, the main British Standard for wood windows, or equivalent standards from other countries
• The performance standards for wind and weather resistance of BS 6375 Part 1
• The minimum performance standards for operational aspects of BS 6375 Part 2, or equivalent standards from other countries
• Accredited by an independent UK or European body to prove compliance with those standards
• Manufactured from timber, sourced legally from sustainably managed forests and with chain of custody
• Service life warranties for durability (typically 30 years), paint life (typically 8 years), ironmongery and insulated glass units (typically 10 years)
• Meet or better the UK Building Regulations' recommendations for energy efficiency

Not all the windows manufactured by Wood Window Alliance members are within the scheme - for example, conservation or specific design requirements may take precedence over these standards.

However, membership  shows a company's commitment to producing high quality windows, and that you can rely on its products.